The following video is part of our "Motley Fool Conversations" series, in which health-care editor/analyst David Williamson discusses topics around the investing world.

In this video, David takes a closer look at two biotechs that have seen big sell-offs recently. Savient has struggled with the launch of its gout drug Krystexxa, while Dynavax prepares to launch its hepatitis-B vaccine. Investors love to buy a bargain, but are these two stocks falling knives destined to cut investors? Watch and find out.

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David Williamson owns shares of Dendreon. The Motley Fool owns shares of AstraZeneca and Dendreon. Try any of our Foolish newsletter services free for 30 days. We Fools don't all hold the same opinions, but we all believe that considering a diverse range of insights makes us better investors. The Motley Fool has a disclosure policy.